<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>let 命令</title>
<script>
 // 把字符串看做字符的数组
 let [a, b, c, d, ...e] = 'JavaScript';
 console.log(a); // J
 console.log(b); // a
 console.log(c); // v
 console.log(d); // a
 console.log(e.join("")); // Script
 </script>
 </head>
 <body></body>
 </html>